{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["cell type", "cell line", "DNA", "RNA", "protein"], "input": "Northern blot analysis of RNA purified from B cells treated with TGF-beta for varying time intervals revealed a significant decrease in steady state kappa and lambda L chain mRNA levels ."}
{"cell type": ["B cells"], "cell line": [], "DNA": [], "RNA": [], "protein": ["TGF-beta"]}